Hole-Burning in the Excitonic Spectra of Polydiacetylene UnderSubresonant Optical Excitation

The hole-burning in the excitonic spectra of polydiacetylene toluene sulfonate under subresonant optical excitation is investigated. Through calculating the nonlinear absorption spectra, the position and depth of the hole are determined based on the phonon-mediated optical Stark effect. The comparison between measured data and theoretical results is made.